MCIMX25 Motorola Semiconductor Products, MCIMX25 Datasheet - Page 119

• Manufacturer Part Number: MCIMX25
• Manufacturer: Motorola Semiconductor Products

3.6.20.1.4
Table 92
Figure 95
Freescale Semiconductor
US26
US27
US28
US29
No.
Transmit
USB_SE0_VM
USB_DAT_VP
USB_TXOE_B
USB_TXOE_B
USB_SE0_VM
USB_DAT_VP
USB_VM1
USB_RCV
USB_VP1
defines the signals for USB in VP_VM unidirectional mode.
shows the USB transmit waveform in VP_VM unidirectional mode diagram.
Name
Table 91. USB Port Timing Specifications in VP_VM Bidirectional Mode (continued)
VP_VM Unidirectional Mode Timing
Rx rise/fall time
Rx rise/fall time
Parameter
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 2
Rx skew
Rx skew
Figure 95. USB Transmit Waveform in VP_VM Unidirectional Mode
Table 92. Signal Definitions for USB VP_VM Unidirectional Mode
US33
Direction
USB_SE0_VM
Out
Out
Out
USB_DAT_VP
USB_DAT_VP
Signal Name
In
In
In
USB_RCV
Tx VP data when USB_TXOE_B is low
Tx VM data when USB_TXOE_B is low
Differential Rx data
Transmit enable, active low
Rx VP data when USB_TXOE_B is high
Rx VM data when USB_TXOE_B is high
Direction
Out
Out
US30
In
In
US34
Min.
–4.0
–6.0
—
—
US32
Signal Description
Max.
+4.0
+2.0
3.0
3.0
Unit
ns
ns
ns
ns
US31
Reference Signal
USB_SE0_VM
USB_DAT_VP
Condition/
35 pF
35 pF
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